NCLEX Pharmacology Questions
Pharmacology questions account for 12–18% of the NCLEX-RN and are the leading reason candidates fail.
Medication questions are the most technically demanding items on the NCLEX-RN. You must know drug classifications, mechanisms, side effects, contraindications, nursing implications, patient teaching, and dose calculations — all under time pressure. Our free pharmacology question bank cuts through the noise by focusing on the drugs that actually appear on the exam and the reasoning patterns that separate a passing candidate from a failing one.
Drug Suffixes That Reveal the Class
Learn suffixes and you have unlocked most of pharmacology. -olol = beta blocker (metoprolol, atenolol). -pril = ACE inhibitor (lisinopril, enalapril). -sartan = ARB (losartan, valsartan). -pine = calcium channel blocker (amlodipine, nifedipine). -statin = HMG-CoA reductase inhibitor. -zosin = alpha-1 blocker. -floxacin = fluoroquinolone antibiotic. -cycline = tetracycline. -mycin = aminoglycoside or macrolide. -azole = antifungal or PPI. -prazole = proton pump inhibitor. -pam or -lam = benzodiazepine. -barbital = barbiturate. -tidine = H2 blocker. -triptyline or -pramine = tricyclic antidepressant. When you see an unfamiliar drug, the suffix tells you the class, and the class tells you the top 3 nursing considerations.
The Rights of Medication Administration
The NCLEX-RN tests the rights relentlessly. Original 5: right patient, right drug, right dose, right route, right time. Expanded to include: right documentation, right reason, right response, right to refuse, right education. Verify the patient with TWO identifiers (name and date of birth, never room number). Check the medication label 3 times: when retrieving, when preparing, when administering. For high-alert medications (insulin, heparin, opioids, chemotherapy), require independent double-check with a second RN. When a patient refuses, document the refusal and the education you provided — do not chart the medication as given, and do not force administration.
High-Alert Medications and Their Antidotes
Memorize these antidote pairs — they appear on almost every exam. Warfarin → vitamin K. Heparin → protamine sulfate. Opioids → naloxone. Benzodiazepines → flumazenil. Acetaminophen → N-acetylcysteine. Iron → deferoxamine. Digoxin → digoxin immune Fab (Digibind). Magnesium sulfate → calcium gluconate. Insulin overdose → dextrose (D50). Anticholinergic overdose → physostigmine. Cholinergic crisis → atropine. TPA / thrombolytic bleeding → aminocaproic acid. Beta blocker overdose → glucagon. Know signs of toxicity, target lab values, and the specific antidote for each — this is the single highest-ROI content for pharmacology questions.
Dose Calculations You Cannot Get Wrong
Practice these formulas until they are automatic. Basic dose: (Desired dose / Available dose) × Volume = mL to give. IV drip rate (drops/min): (Volume × Drop factor) / Time in minutes. mL/hr: Total volume / Total hours. Weight-based pediatric: mg/kg × weight in kg = total daily dose, then divide by number of doses. Always double-check units — mg vs. mcg errors are the leading cause of pediatric medication harm. On the NCLEX-RN, round to whole numbers only when the question specifies; otherwise leave decimals as calculated (0.5 mL is valid, but 0.5 tablets is usually not — verify scored tablets).
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